The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
Gray Code Decoder in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 160th Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 160th emgordon154 0 67 396ms 9 May 2025 160th namelessiw 0 67 407ms 2 Nov 2025 160th error256 0 67 111ms 30 Jan 2026 160th CaedenHarper 🇨🇦 0 67 553ms 8 days ago 160th fuzzylojik-golf 🇺🇸 0 67 490ms 5 days ago 160th HumanoidCPU 0 67 577ms 4 days ago 160th madex 🇩🇪 0 67 9ms 2 days ago 160th emplv 🇱🇻 0 67 6ms 32 hours ago 170th lifthrasiir 🇰🇷 0 68 559ms 11 Dec 2024 170th Shanethegamer 🇺🇸 0 68 257ms 13 Dec 2024 170th Yax42 🇫🇷 0 68 16ms 5 days ago 173rd khvdm 0 69 137ms 13 Jan 2025 173rd 4atj 0 69 1,062ms 21 May 2025 173rd albanian-laundromat 0 69 533ms 6 Dec 2025 173rd GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 173rd albanian-laundromat 0 69 380ms 22 Feb 2026 173rd error256 0 69 410ms 7 days ago 173rd edsrzf 🇳🇿 0 69 394ms 4 days ago 180th btnlq 0 70 193ms 4 Dec 2024 180th error256 0 70 129ms 15 Jan 2026 180th error256 0 70 18ms 16 days ago 180th Seek64 🇩🇪 0 70 116ms 5 days ago 180th DialFrost 🇸🇬 0 70 116ms 3 days ago 180th madex 🇩🇪 0 70 485ms 23 hours ago 186th GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 186th GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 186th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 186th ovs-code 🇩🇪 0 71 134ms 5 days ago 186th edsrzf 🇳🇿 0 71 18ms 4 days ago 186th kg583 🇺🇸 0 71 18ms 4 days ago 186th rhdqor213 0 71 4ms 4 days ago 186th ovs-code 🇩🇪 0 71 129ms 3 days ago 194th dokutan 0 72 525ms 15 Aug 2025 194th rucin93 🇵🇱 0 72 9ms 22 days ago 194th aksyristos 0 72 247ms 17 days ago 194th blaztoma 🇱🇹 0 72 123ms 5 days ago 194th Emutis 🇱🇹 0 72 121ms 5 days ago 194th KasperKivimaeki 🇫🇮 0 72 4ms 5 days ago 194th edsrzf 🇳🇿 0 72 9ms 4 days ago 194th zacjl 0 72 131ms 3 days ago 194th Steffan153 🇫🇮 0 72 3ms 3 days ago 203rd pardouin 🇫🇷 0 73 179ms 14 Feb 2026 203rd Steffan153 🇫🇮 0 73 166ms 19 Feb 2026 205th saito-ta 🇯🇵 0 74 3ms 11 May 2025 205th error256 0 74 3ms 12 Jan 2026 205th lukegustafson 🇺🇸 0 74 189ms 20 days ago 205th albanian-laundromat 0 74 9ms 12 days ago 209th kg583 🇺🇸 0 75 38ms 1 Dec 2024 209th hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 209th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 209th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 209th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 209th albanian-laundromat 0 75 108ms 5 Jan 2026 209th albanian-laundromat 0 75 455ms 6 Jan 2026 209th GolfingSuccess 🇬🇷 0 75 19ms 11 Jan 2026 209th albanian-laundromat 0 75 238ms 26 days ago 209th madex 🇩🇪 0 75 34ms 10 days ago 209th CaedenHarper 🇨🇦 0 75 149ms 8 days ago 209th fuzzylojik-golf 🇺🇸 0 75 123ms 5 days ago 209th Yax42 🇫🇷 0 75 4ms 5 days ago 209th edsrzf 🇳🇿 0 75 17ms 4 days ago 209th plcc0 0 75 22ms 4 days ago 209th zgialor-lab 0 75 25ms 4 days ago 209th ndren 0 75 19ms 3 days ago 209th madex 🇩🇪 0 75 439ms 2 days ago 209th CornerMercury 🇬🇧 0 75 19ms 2 days ago 209th DialFrost 🇸🇬 0 75 25ms 5 hours ago 229th Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 229th ovs-code 🇩🇪 0 76 4ms 10 May 2025 229th AlephSquirrel 0 76 43ms 3 Dec 2025 229th AlephSquirrel 0 76 445ms 3 Dec 2025 229th albanian-laundromat 0 76 18ms 26 days ago 229th albanian-laundromat 0 76 188ms 20 days ago 229th MeWhenI 🇻🇦 0 76 586ms 13 days ago 229th MeWhenI 🇻🇦 0 76 184ms 3 days ago 229th duckyluuk 🇳🇱 0 76 128ms 3 days ago 238th lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 238th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 238th emgordon154 0 77 161ms 9 May 2025 First Prev 161–240 of 406 Next Last